CN2495461Y

CN2495461Y - Combination mould for processing barren powder

Info

Publication number: CN2495461Y
Application number: CN 01236568
Authority: CN
Inventors: 房卫
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-23
Filing date: 2001-04-23
Publication date: 2002-06-19
Anticipated expiration: 2011-04-23

Abstract

A poor soils powder processing combined die of the utility model consists of an inner die, a plastic external die, a lower die pad and an upper die pad. The utility model is a combined die, which can form an accurate sized exterior and is especially applied to the poor soils processing. And the inner die and the external die of the combined die can be accurately fetched out. A hollow fine long rod product, the wall thickness of which is 2mm-20mm, can be conveniently processed by the die in practice. No matter whether the used blank is the plastic material or the poor soils material and no matter whether the green body is rectangular, round or other shapes, the blank can be process. And the pressed green body has the advantages of structured appearance, good straightness, even wall thickness, high green body density, good index consistency, simple structure and low cost, which makes gratifying contributions to the hard problems in the die processing.

Description

Combined lean powder die

The utility model belongs to the mould in the industrial production, particularly be the lean property powder that is applied to poor plasticity, used processing assembling die and processing method thereof during as moulding such as carborundum, silicon nitride, corundum.

Mould is parts commonly used in the industrial production, for example plastic products, rubber, shape or the like all need mould, but for the moulding of the lean property powder of poor plasticity such as carborundum, silicon nitride, silicon nitride combined silicon carbide, corundum or the like, general mould is difficult to produce qualified products; General now employing injection forming or extrusion modling, injection forming is subjected to the influence of granularity very big, many indexs of shaped article are affected, and the density of molding blank is also little; In order to increase the plasticity of raw material, add a lot of plasticizer and wetting agent during extrusion modling, this can produce many harmful effects to goods in the sintering process of producing, and the density of product is low.In addition, semidry method mold pressing vibration moulding and isostatic compaction method are to improve the effective way of the every index of base substrate, but shaped article is when being porose elongate rod, especially in diameter and length than greater than 20 o'clock, and when surface state was had requirement, the demoulding was a very big difficult problem.

The purpose of this utility model provides a kind of every index that requires that can guarantee shaped article, combined lean powder die that can be conveniently stripped again.

The purpose of this utility model is achieved in that accompanying drawings is as follows:

A kind of combined lean powder die, its structure is:

1. it is made up of internal mold 1, external mold 2, interior die sleeve 3, following die-cushion 4, Upper Die-sleeve 5;

2. internal mold 1 is established 3 holes 7 at least for the cylinder of centre bore is arranged on the damaged surface, and each 7 the inner, hole communicates with centre bore; Internal mold 1 outer surface tightly is with interior die sleeve 3;

3. inner membrance 1 is pegged graft with the concentric and following respectively die-cushion 4 in the lower end of external mold 2; Plug is being adorned Upper Die-sleeve 5 in the cavity between inside and outside

mould

1,2 upper ends.

Accompanying drawing 1 is lean property powder processing assembling die structure cut-away view

Accompanying drawing 2 is lean property powder processing assembling die static pressure structure cut-away view

Accompanying drawing 3 is lean property powder processing assembling die structure chart

Description of drawings: can find out that by accompanying

drawing

1,2 the lean property of the utility model powder processing assembling die is by internal mold 1, external mold 2, interior die sleeve 3, die-cushion 4, Upper Die-sleeve 5, outer die casing 6 are formed down; Interior die sleeve 3 is enclosed within the outer surface of internal mold 1, and external mold 2 concentric locking collars are in internal mold 1 outside, and both are provided with Upper Die-sleeve 5 between the upper end, and both separate between the lower end and are socketed in down on the die-cushion 4.

Upper Die-sleeve 5 is divided into rigid enclosure 5-1, resilient sleeve 5-2; Following die-cushion 4 is divided into establishes central channel 4-4 and water jacket 4-5 on rigid pad 4-1, cushion 4-2, the rigid pad 4-1, establish wedge-shaped slot 4-3 and 5-3 respectively on cushion 4-2 and resilient sleeve 5-2 outer wall, makes its better tightness.When Upper Die-sleeve 5 usefulness rigid enclosure 5-1, following die-cushion 4 should be rigid pad 4-1; When Upper Die-sleeve 5 usefulness resilient sleeve 5-2, following die-cushion 4 should be cushion 4-2, and adds filler 8 below the resilient sleeve 5-2.

Above-mentioned 3. in fluid in the nib 7 be meant that water or gas or wet goods all can.

Plastics external mold 2 is to make with the plastics with certain intensity, when processing than farm labourer's part, when the rigidity of plastics external mold 2 is not enough, at plastics external mold 2 outer surface suit rigidity overcoats 6.

Embodiment is as follows: according to above-mentioned pressurization operation assembly jig, under vibrational state, the carborundum blank is added in the inner chamber between internal mold 1 and the plastics external mold 2, block up rigid pad 5-1 in that the chamber is suitable for reading, 5-1 presses down compacting with rigid pad, makes the blank moulding; Rigid pad 4-1 with the lower end changes cushion 4-2 into then, seal end opening, rigid pad 5-1 with the upper end takes off again, add inserts 8 cushion 5-2 beyond the Great Wall more earlier, envelope is tight, in the interior nib 7 that the centre bore of internal mold 1 is communicated with, add entry again, die sleeve 3 in the punching press, by die sleeve 3 in flexible pressure is passed to blank 9, and between generation gap, after the release inner membrance is deviate from, again external mold 2 is toasted together with blank 9, plastics external mold 2 is subjected to the thermal softening can be by deviating from the blank 9, and after the baking, the baking molding spare that takes out blank 9 promptly.

The utility model plastics external mold 2 adopts polyvinyl chloride, polyethylene, poly-third gradegrade C plastic material all can, it has certain intensity when normal temperature, during moulding and moulding can keep the shape invariance that needs when finishing, starting stage in baking also can keep shape and size constancy, when the rising gradually hardening of blank 9 along with temperature, intensity strengthens, and plastics external mold 2 has the characteristics of slowly deliquescing, easily just external mold can be taken off, and guaranteed the base substrate outward appearance regular and size accurately.At processing speciality product or high-intensity oscillation, can be on the external mold outer cover overcoat 6 of metal or nylon, very little gap is arranged therebetween, take out with convenient dress.

The advantage of the lean property of the utility model powder processing assembling die is very outstanding, is a kind of energy moulding external form chi Very little accurately vibration pressurization, or the good method of vibration pressurization-isostatic cool pressing are particularly suited for lean property powder and add The worker can take out the assembling die of internal mold, external mold easily, exactly. Can be very square with this mould in the practice Just the elongate rod goods that process hollow between 2 millimeters-20 millimeters of the wall thickness, the blank that no matter uses is to mould The property material or poor material, its base substrate is that square, garden shape or other shape all can be processed, and extrudes The base substrate outward appearance regular, size is accurate, linearity is good, wall thickness is even, the blank density height, index is consistent The property good, its structure is uncomplicated, cost is low, the maintenance, easy to clean, for the difficult problem of Mould Machining has been made Gratifying contribution.

Claims

1, a kind of combined lean powder die is characterized in that:

2. internal mold 1 is established 3 holes 7 at least for the cylinder of centre bore is arranged on the damaged surface, and each 7 the inner, hole communicates with centre bore; Internal mold 1 outer surface is with interior die sleeve 3;

3. inner membrance 1 is pegged graft with the concentric and following respectively die-cushion 4 in the lower end of external mold 2; Plug is being adorned Upper Die-sleeve 5 in the cavity between inside and outside mould 1,2 upper ends.

2, combined lean powder die according to claim 1 is characterized in that: at external mold 2 outer surface suit rigidity overcoats 6.

3, combined lean powder die according to claim 1 is characterized in that: the fluid in the interior nib 7 is meant water or gas or oil.

4, combined lean powder die according to claim 1 is characterized in that: Upper Die-sleeve 5 is divided into rigid enclosure 5-1, resilient sleeve 5-2; Following die-cushion 4 is divided into establishes central channel 4-4 and water jacket 4-5 on rigid pad 4-1, cushion 4-2, the rigid pad 4-1; Rigid enclosure 5-1 is corresponding with rigid pad 4-1; Resilient sleeve 5-2 is corresponding with cushion 4-2.

5, combined lean powder die according to claim 4 is characterized in that: establish wedge-shaped slot 4-3 and 5-3 respectively on cushion 4-2 and resilient sleeve 5-2 outer wall.